Firebase Functions v.9 - Internal Error after using connectFunctionsEmulator()

Question

I'm trying to setup Emulator for my firebase functions but I receive this annoying internal error. Let's begin with code.

  const requestApi = () => {
    const functions = getFunctions(app);
    connectFunctionsEmulator(functions, "127.0.0.1", 5001);
    const helloWorld = httpsCallable(functions, "helloWorld");
    helloWorld()
      .then((result) => {
        console.log(result);
      })
      .catch((error) => {
        console.log(error.message, error.code, error.details);
      });
  };

So this function works great, except when I add connectFunctionsEmulator(functions, "127.0.0.1", 5001); to it.

The catch block logs only this useless message.

internal functions/internal undefined

I also receive warning about Timer.

Setting a timer for a long period of time, i.e. multiple minutes, is a performance and correctness issue on Android as it keeps the timer module awake, and timers can only be called when the app is in the foreground. See https://github.com/facebook/react-native/issues/12981 for more info. (Saw setTimeout with duration 70000ms)

That's all. Pretty strange, isn't it :/ ?

-- Cloud Function

exports.helloWorld = functions.https.onRequest(async (req, res) => {
  res.json({ result: `Check` });
});

I add this here cause someone can be curious about this. But, as I mentioned before, function work great when it's deployed. I'm almost sure that it's client side issue.

I receive this error no matter what host or port has been provided. Error is thrown even when Emulator is off.